Due to trademarks I cannot call my new company AppleComputers or CocaColaBeverages (obviously).

What if I start using #AppleComputers hashtag in my tweets or posts on Instagram?

In other words: Is using a #hashtag of a trademark infringement?

I think that this area of law is new and there might not be many precedents...

Bonus question: Does the intention matter? What if I make it clear that I'm not associated with Apple? Even if in my mind I make it clear, who decides (Judge, Jury, Attorney, Prosecutor) whether it was clear enough?

EDIT / UPDATE: An example (just made it out) might be Greenpeace using #StopShell #StopExxon #StopBP #StopFossilFuels... My general question is use of the hashtag in social media channels. Domain / website can be seized but the hashtag will prevail...

(the concept of creating resilient channel of communication)