I'm happy to receive requests to meet up for coffee from anyone involved in my line of work, and nine times out of ten I will accept them if I can spare the time. Spending time and sharing thoughts with others from other walks of life (and work) introduces new learnings and richer perspectives healthy for personal & community growth.

That said, I am entirely uninterested in receiving requests from those looking to either a) probe me for information followed by an abrupt cut-and-run, or b) those hoping to "network" with me to obtain contact information of others I know. If you want information, go find it yourself, and if you want to contact my contacts, contact them yourself.

I recently met with a guy like this despite being warned not to by a trusted colleague. I met with this person out of curiosity - I wanted to learn how douchebags behave, mainly because I don't know many douchebags. Man did this guy personify douchhebagery. Here's how he struck out, which are all signals this is not someone I want to be associated with under any circumstances:

Strike 1: He called me "Joe". My name is "Jon"
Strike 2: He didn't offer to buy me a cup of coffee after I made an effort to join him.
Strike 3: He lied about his background, asked me for information, asked me for contact details (I didn't share either of course), and then proceeded to explain how he was trying to start a project and needed a product and product People to help him.

Why would I help him?! What, I'm that guy you can talk to, get information from without reciprocating, get contacts from, and build a product for you, without offering anything in return (not even a friggin cup of coffee)? No thanks. Go elsewhere. Excommunication would be a suitable option.

I'm quite certain I can ID douchebaggery from afar following this learning experience, but the below UD explanation also helps:

Ostentatious display of affectation in its most conspicuous form; haughtiness without any diminutive regard to others; Provoking others with a habitually pompous attitude or disposition.

Yeah, that about sums up the sentiment.