There is only one bad experince that I can think of that we have had with a single man...and even that wasn't that bad.
We were at a club and a single man that was a fairly regular visitor to the clubs chat room was also at the club that night. While I was out on the dance floor with a friend of ours dancing, the single man was also dancing with someone else and everytime he would get close enough to me he would run his hand up underneath my dress...the first time I could forgive, but the second time he did it and I slapped his hand away I told the friend I was dancing with that if he did it again I was going to punch him in the nose. Our friend asked what happened and I told him, he immediately drug me off the floor and back to the table where everyone else was sitting, told them what had happened and then proceeded to have a talk with the club owner. The situation was taken care of immediately.
Now...the thing is that this single man thought that because we all got so friendly in the chat room that it was okay to get friendly when meeting in person...which was wrong.
I will say that I have had more bad experiences with married men taking liberties like this than I ever have single men, especially since this is the only bad experience with a single man I can think of.