1

They know a PC from somewhere else

A plan of theirs just went wrong

2

They need help from people like the PCs

They’re prejudiced against a PC type

3

They’re looking to earn a bribe

They’re offended or insulted by something

4

They’re intimidated by the PCs

They’ve had a terrible day so far

5

They’re weakened and can’t pick fights

The PCs have just made them more work

6

They’re prejudiced in favor of a PC type

They’re afraid of being seen associating

7

The PCs somehow solved a recent problem

The PCs look like easy prey to them

8

They don’t want trouble right now

They just don’t want to deal with them