ethics - is this considered a hit and run ?

[robinsons]

playing on a small fairly unknown site with a fairly regular player base, will typically have 3-5 5/10 games running at peak times.
I sit down at a 5/10 table, double up off another regular in my first orbit with QQ>JJ, a few hands later he busts the softest player at the table who doesn't rebuy and leaves. another regular takes his place.
I play under the blinds come around and then leave as I think the table is no longer worth sitting at, however the regular who I had stacked got very upset with this. thoughts?

as far as I can see I did nothing wrong here, it's not like we were playing hu or anything (table was full 6max) and certainly didn't have anything in place regarding the amount we would play.