I've used the stuff myself occasionally and it certainly has a noticeable odour. Asking them to stop probably isn't going to go down well as obviously they have use for it (would pritt stick* do the same job?) What's their application and how often are they doing it? *Other brands are available.

You said it yourself - occasional use. The whole point about assessment is that you look at the context of the chemical in use not just what the chemical contains. Sure, a safer alternative is always preferred but safer alternatives often don't do the job. Pritt stick is rubbish IMO but then I think you can still get paste on type glues that might be better. If they insist on using it tell them to open the windows. As long as it is occasional use then I wouldn't be concerned. My personal opinion is that you're going OTT for the scenario you've given but then this is the point that I'm usually shot down in flames for not taking H&S seriously enough. Personally I think I take it far too seriously as it is!

I'm not aware of anything safer that will do the same job. My application was outside of work but I haven't found a suitable alternative that held well but didn't turn the paper into slop (putting cutting patterns onto sheet steel and setting out vinyl graphics for vehicles).

The storage, use and disposal of used aerosol cans should all be considered as part of the fire risk assessment process too.

There are repositionable tape runners (like there are for correction tape) on the market - no areosol involved... A search for "repositionable tape" on Google (other search engines are available) brings up a raft of possibilities. Also glue dots might be another alternative. I use the tape personally. Hope that helps