There's no need to insult someone by calling them names or demeaning them in any way. It's one of the first "DO NOT" rules, and the most common rule that is broken. There was no need to add an insult to your post, which is why calling BSLIMM a dumbass is unnecessary.
It may not be as harsh as profanity, but it's still a demeaning thing to say. Insults of any kind will not be tolerated. Please do not try to justify breaking a forum rule, there's no excuses, no matter how "big" or "small" the insult is - as far as the rules are concerned, it's all unnecessary and unwelcome.