I have long argues that jargon *in itself* is not bad, it is, as you say, information shorthand - a way of saying something more simply. The problem occurs when you use jargon outwith the context of a community within which the jargon is a recognisable communication.

Computer geeks shouldn’t talk about ‘NIC’s with their next door neighbour, they should talk about network cards. (Or, better still, talk about football instead ;) )

The other problem is when people who *don’t* understand the jargon insist on using it anyway.