As long as the question is not asking for a product recommendation that is.
I forgot my toothpaste and it is impossible to buy in this situation, are there any substitutes?
Is there any way to kill a fly without a flyswatter?
The idea is that they're looking for the same result they would get by using a product, just without a product. It seems to me like that would count as asking for a lifehack, or should they be off-topic?