If I may, it sounds like you have some housecleaning to do. If you can't keep your guild members in their lane then it's time for new members, or new leadership...
I couldn't disagree more. I proposed something a while back to enable guild founders and those with elected rights to have admin rights as default for guild messages. I had a player that was quietly harassing guild members through PM but those members were being tough and did not complain then the abuser updated his profile and put horrible derogatory statements about particular players there and then he started openly harassing them on public messages over the weekend. I'm not a weekend player so my response was delayed but it all escalated very quickly. Housecleaning had nothing to do with it. If leaders don't know about a problem we can't act on it. It's too much to expect players to complain before it gets unbearable. In this case the target did not complain until it had already gotten far beyond typical game insults. The abusive player was removed after trying to work things out through PM but his messages remained and some guild members never left the threads so kept receiving the inappropriate messages for a long long time- many months- hopefully they were just lazy and not reading them but who knows. This member became hostile and openly abusive. Once I intervened he targeted me, which was better than him targeting my guildmate honestly because as founder you should expect a certain amount of difficulty with the odd player but those messages he started to to guild were there- permanently. So each guild member had to leave or decide to stay to watch the trainwreck. Sure sure reports were made to inno- but they said they couldn't intervene on guild messages only chat posts that they could check. So we had a bully to deal with on our own who kept on with the harassment even after he was dismissed from the guild for being abusive for months and months (that's founders/ leaders only recourse right now- give the boot). He still had an open door to harass the guild because he had started guildwide messages and was included on others that had limited admins that he did not start.
Then it was a trial to get in touch with anyone who had included them on a guildwide message to get them to update to guild members only and nothing- absolutely nothing- could be done with guildwide messages originated by the abuser. All I could do was to request that people leave the thread and cross my fingers for full compliance. How many guild leaders out there believe that they get full compliance on any request? Full complaince is an absolute myth- and we can't hold players at fault for that. It's not their job to make sure they read every message. We'd love it if they did but even I can't claim to read every post.
I had negative feedback on my proposal because one particular forum regular thought it was too dictatorial to have leaders and founders defaulted as thread admin. I did have support- more support than lack of support but nothing was implemented in game to bring about change. So FoE remains open to abuse and bullying. I refuse to limit guild members rights to start new threads instead we are application only. The purpose of that is to prevent the harasser from rejoining the guild. I prefer letting my guild members have the right to start new threads but I'd sure love to be able to step in and remove the rare abusive post. This is one of those things where it's not a problem until it's a problem! But it's a big big problem when it surfaces.
So as far as housekeeping we did the following:
intervene and contact the harasser and try to reach some amicable outcome to no avial
Remove the offender from the guild
Change from being an open guild (which stinks because we advertise as a newbie friendly learning guild) to application only- just to prevent this one person from rejoining. Simply moving to being application only requires new players to understand how to request invites to a guild. Sure it seems simple but when people are just starting out every little thing has a learning curve.
Hope and cross our fingers that they would grow bored and leave us alone on threads they started. This was the worst step because this person was genuinely invested in creating havoc. He did not give up for a long long time.