Deleting Bad Behaviour log in Database

Yes, it’s perfectly fine. You can even turn off logging in Bad Behavior I believe. ??

And note that I don’t know of any hosts that keep track of your database size, i.e. I wouldn’t worry about that kinda stuff. ??

Just a reminder: always back up your database before doing anything in it.

Mmm, indeed, yes, always a good thing to do.