You can yes, Wolfwaffles, but a desktop site on a mobile phone can bring up issues. Some being that you need to zoom in to click nearly anything, typing "Quick Replies" is glitchy at times where the text box won't move with your letters so you can't see what you're writing, and it's also just tedious overall, in my opinion.
I think a mobile site would be easier for mobile phones and devices depending on how it were designed, such as an enlarged menus and simpler navigation ^^