I find it very amusing when people ***** at me cause "I don't help top" when they have 3-4 top and I go gank and cap bot (just like you said you did). We have 3 and they're still mad.
"FDru why are you bot"
*after I just sent their bot laner to the fountain and am in the middle of capping their turret*
It's like all they see is that you aren't joining in on their Windmill suicide mission. They then proceed to blame you for them losing mid after they feed top a triple kill.