You'd have to find me first. Space is big. You'd have to beat me in combat and that's just not going to happen.
On a separate note and for anyone reading please pass this question on to the developers, can a heat signature of a ship be suppressed if you are "sun up" to a target? If my ship was as close as I dared to be in proximity to a star and my target was further away, can my heat signature disappear, irrespective of the usual cloaking stuff? After all, the radiation and heat from a nearby star would be immensely greater.
Sort of yes, sort of no. The fact that space is a vacuum means that there is actually nothing to conduct heat. So if you were bobbing about outside the atmosphere, armed with the biggest IR heat reader imaginable, and pointed it at the sun, you'd get the sun's temperature (really bloody hot... um, about 5,000c if I remember off the top of my head) but direct it to a point about 1,000km away, you'd read nothing. Now if there was SOMETHING there, and you hit it with your temperature sensor, then that something would be rapidly absorbing heat (and would quickly vapourize).
So the short answer is that absolutely any tactile object in space will give off a heat signature, regardless of where it is, since it's measured against the actual temperature of space, which is absolute zero.
That said, you then get into whether or not a sensor would be able to differentiate small fluctuations like that. But if you're in a ship, and approach a star, remember that you'd be taking on more and more heat energy compared to the space around you, so you'd actually light up like a Christmas tree.