Nothing to tap on when visiting other towns?

I give people 6-8 weeks before I clear them out for adding new people. So far since THOH I have had 5 or 6 people in my list go inactive. The longest among then at 4 weeks now. Also I noted that all of them did not get the update after the event as the alien sound plays when I visit them. I've gone as long as 4 weeks not playing a game I regularly play so I figured others probably do too otherwise I'd cut them loose sooner than I do.

I was going through my friends today and several of them had the HoH sound when visiting so I instantly looked at the last time they played and some of them were 3 to 5 weeks ago, so got rid of them.

Some of the others that I think took a break are back now so i have plenty to tap on.

ive gotton the grem-alien sound in some of my neghbors towns but they are playing and have tapped on me strange.