If your'e planning on opening the bonnet catch and allowing it to fly up and bounce when the struts are at full extension - then dare I say, you'd be a bit of a wally and yes, you could damage something.
Clearly the bonnet weighs a lot less than a boot lid. By using the same struts, they're naturally going to open it with more force but having an ounce of common sense and a bit of restraint - you aren't going to damage anything.