Not sure what your message is but it's pretty clear that whatever "don't" is meant to cover, I haven't, because I'm still single.
Are you saying:
Don't date single Mom's?
Don't bring new rules?
Don't sit in the corner and shut up?
Most men go through the courtship period with company manners, which means we avoid conflict. That time shouldn't be a matter of not rocking the boat...it should be a time of setting expectations. If she has a problem with your expectations, then you have to seriously consider if you have a future together.
She should do the same. You should (IMO) have a clear idea about what your marriage would be like before you say yes.
Men can be wimps. We shouldn't blame women for the situations we helped create. Communicate clearly! If it's not going to work, acknowledge that before the wedding...and make sure you like your spot in the order of priorities.
I hope that spoke clearly.