“the rationale behind not using dating web sites is that supposedly some child molesters have used these sites to find single parents with young children”
Yes, that is their lame rationale, however, there is nothing stopping an offender from hooking up with a single mother without the use of the internet. No probation officer can dictate your life to the point of telling you that you cannot ever be in a relationship. In fact, over the years I’ve been on probation (and when I was FORCED into SOR “treatment”) their favorite thing to say constantly is: “We want you to have healthy, consenting relationships. We don’t want you staying single forever”.
However, if you DO end up meeting someone with a child, their idea is that the single parent MUST attend a course on how to spot you doing something wrong or suspicious. But they cannot flat out say “No, you cannot fall in love with someone who already has kids”. They’d be sued up, down, sideways and in between for that.