I am not sure what to do most of the time when facing a donk bet....here is an example hand, how would you handle this?

In this hand villain was 50/0/1.5 over only 15 hands, so I don't think that can tell you much.
PokerStars No-Limit Hold'em, $0.02 BB (7 handed) - Poker-Stars Converter Tool from FlopTurnRiver.com
saw flop
MP1 ($2)
MP2 ($3.05)
CO ($4.28)
HERO (Button) ($2.65)
SB ($2.94)
BB ($9.32)
UTG ($0.57)

Preflop: HERO is Button with 10, A
UTG calls $0.02, MP1 (poster) checks, MP2 calls $0.02, 1 fold, HERO bets $0.14, SB calls $0.13, 4 folds

Flop: ($0.36) A, 10, K (2 players)
SB bets $0.52, HERO???

Since I already know the result, I am influenced on what I should do, but in general when players donk after calling your PF raise, are you basing it mostly on their positon pre-flop? Their bet size? or a combination of both? It seems most players at this level have no clue what position is, so I don't think that can be much of a factor.