Scene with Chinami was straw that broke the camel's back I'm pretty sure. I think Sensei washed her hair in a bath. Lewded the undeniable loli. Most games at least pretend their 'loli' content is just very petite young adult content. Senebus did not pretend otherwise for very long once he got rolling. For example I'm pretty sure SO takes place in a 'School', never mentioned specifically if it is a highschool of a college. The girls are never specified to be under 18 or not. Everyone knows what is going on and we are all going to hell for it.
If mods here had a problem with LiL's content, the site would have removed the game entirely instead of just banning Sel. The real issue was that Sel has a huge problem with piracy and tried to report his own game to get it removed IIRC. As well as sneaking in DRM into one of the updates. There was probably more that others remember.
Edit: I'd add that I think the same applies to Personas. If they had a problem with a criminal publishing a game, SO would have already been scrubbed. So this forum probably won't be a barrier to a comeback, it'll be a hundred other things stopping him.