Don't you want it to appear in a different colours? Possibly blinking and flashing "Hey Look at me, I'm a LINKKKKK"???
I don't know your posting style, so I'm not sure if you're trolling but just in case you're not, I think I need to remind you that I'm not a 14 year old girl (low hanging fruit...go ahead hacks...you know who you are.).
I'd think a simple underline would be sufficient.
Thank you.