Sorry, but that isn’t nice way. Do you wanna try how it work with mobiles, pads or another devices without keyboard? And filler text isn’t any better. Then an user must know exacly where to touch.
Better solution is use mentions and automatic links where those should be: in the context. And let other components do what’s expecting.
So this is much user friendly way:
purpose of hidden text or just a header
Do you want mention a pseudo user, like @Discourse?
And I’m not sure if this a bug at all, but comes by used technique.