I would think that replacing them would be a good idea, I have had hood struts fail before only in the cold, but they worked fine when it was warm outside. Getting bonked in the head even once isn't worth it.
I am disappointed to hear that they were not sympathetic to your concerns. If they get more complaints maybe they will do something about it.
In the meantime replacing the struts should take care of the problem. Be careful when opening the door until then.
Friday, November 16th, 2012 AT 12:31 AM