I would like to go back to Belfast to work for a week. Anybody knows if it is possible?

I have had a text message from the garda in Belfast long time ago saying "don't go it is dangerous"

I've had work there in the past & I didn't have any problem at all but I was working from a hotel. If I go back I want to use the same hotel again but not sure if I should go to Belfast or not as I hear that the garda will contact you in your hotel room & ask you to leave the hotel straight away same day of arrival??

So it is my wonder...to go or not to go???