Tickling
A recent discussion on Facebook[1] states that when tickling a child, that if the child asks you to stop, you must stop. Failure to do so teaches children they don't have a right to bodily autonomy and teaches them the wrong lesson on consent. The OP also alluded to it being a form of abuse.
Other parents state that they would use tickling to distract a child so they can put on their shoes. Also, that when they would stop, the child is likely to ask for it again. The response by the OP is that even in these cases, when you're ask to stop, you stop.
A parent argued that their child are not in charge and it is the parent who should decide what is best for them, from what they eat to what they wear, and yes, whether to be tickled or not. Allowing children the right to decide, they would make poor decisions as a result.
Men's Issues
While on it's face not necessarily a men's issue, it has been shown that girls and women tend not to like being tickled, whereas boys and men do. If tickling were deemed abusive, then it would be boys who would be most affected by this. [citation needed]