Why do you consider it cheating? Playing the system in the most efficient manner isn't cheating.
ok. so it is not cheating in the literal sense.
how about pool hoppers are just really annoying.
they hop around hoping to siphon off the cream of short blocks while the regulars hang tough
and solve those long blocks. then when we do finally kill off that long two hour block they come
back hoping to get in on a couple short blocks.
regular miners at a pool want all the cream now and that ticks hoppers off.