Often it is assumed that the one offering the job holds all the power and can come up with all kinds of tests and hoops you should jump through. People forget that also often the one offering a job is desperate to find the right person to do the job (although that may not be you). Sometimes you should reverse roles, I do that in my business sometimes. Not everyone is your customer (or employee, employer). The "worst" I've encountered are the bad representatives of temporary help agencies where I've worked for in the past. They're often dumb, have no significant skills, are arrogant and somehow you're expected to appease them? Maybe not...