Why target low score? (in General)

This is not a whine, I'm just honestly confused. I've noticed that there are periods of time when people who are 2 - 3 times my power rating and often more than double my score are spending BA to defeat me. What I would like to know is why they would do this. I have not attacked them to gain their attention, and my understanding is that they would get much lower exp/money from me than from attacking someone closer to their score. Am I missing some reason that makes lower scored characters attractive targets?

Some of us are lazy and don't update our fightlists. Some, just don't care. Another reason may be that there is a vast conspiracy against you. :) Seriously, probably the first reason I gave. No biggie.

That reminds me to update mine. Thanks.