Anyhow I want to know that if we delete our posts ourselves, does it have a bad effect on our account and can we still get tagged or something or it is completely normal ?
It's completely normal. There are no reason to tag someone for that however we have some over enthusiastic forum members who will write a note something like "Be aware..." but I think most of us already learned how to ignore this group and their leader.
Can I guess it? But this doesn't seem like a guessing thread, so let's forget it.