I've offered to repeat a position when someone did a move they didn't mean to, but only because they were a regular opponent. They declined and played on. That's how it should be, your mistake.
Otherwise you just have to deal with it, nobody owes you anything. I wouldn't think of asking for leniency, and no longer will I offer it.
You'll find that you give the draw to be sporting and wont get thanked anyone, people are ungrateful. I saw that in a previous post on this forum. People think they have a right to get a draw from a 'drawn' position or a win from a 'winning' position, but you have to earn it.
LOL!