Landlord tactics (real and presumed) to oust tenants


Despite being taken to task (too mildly to make a difference, it seems), some landlords persist in working with "tenant relocators" or taking other moves whose result would be to oust tenants.  Some rent examples:
1. A tenant relocator in East Harlem
2. Sealed windows and air conditioners for a year in a building "wrapped" during renovations.
3. Possibly using police impersonators to ask tenants about their primary residence and roommates. (There's no clear evidence that this was on behalf of the landlord - but who else would be curious about rental status of separate tenants in the same building?)