[Leslie]

What people sometimes do, and it's definitely unwise, is to just assume all big companies, by virtue of being large visible companies, are incapable of the same underhanded behaviour of small shady fly by night operations.

Companies and or corporations are just as capable of screwing you over as anyone else.

Does the name Enron ring a bell?
Want more examples?

When you are buying something, make sure you know what you are buying. The phrase buyer beware applies to more than just dealing with strangers on eBay eh.