I think dating single mothers, contributes to an entirely bigger set of problems.
1. It does not do anything for the guy. She will expect you to play dad to her kids when it suits her purpose and she will also remind you "you're not their father," when it doesn't. all it does is deplete his fiances and resources raising another guys kid or kids.
2. It teaches women they don't have to be faithful, and it rewards piss poor quality when they know there is always a thirsty beta waiting in line for her.
3. Too many single mothers believe they don't need to work because of the welfare system has rewarded them with free income. This teaches their offspring that they don't have to work either.
4.. the other side of this, Governments are more than happy to put you on the hook for her and the kids bills if it gets her off the welfare system. Even if it isn't your kid. 4 million american men are financially responsible for raising kids that aren't theirs because of paternity fraud.
5. She will ways put the kids before you and expect you to do the same, even though they aren't yours.
6. Sometimes dealing with the kids themselves, they don't mind living under the roof you pay for, using the utilities you pay for, eating the food you pay for, using your furniture and electronics you paid for, but will remind you "you aren't their father and you can tell me what to do!" When you ask them to clean their room or cut the grass.
7. If they piss you off from said behaviour in point #6 she will side with the kid every time and treat you like sh!t
8. You will be used.