Well it depends on how you use it. If you use it like Obi-Wan did to try and get past a few stormtroopers or to cause a distraction to get away it's all fine.
But if you for example use the mindtrick to make a person turn against people on his own side or to make him shoot himself or jump of a cliff you're practically driving yourself to the dark side.
Same goes with push/pull/grip, it's all basically one power, moving or manipulating something with the Force, but depending on how you use it will bring you to the dark side or keep you on the light side. (for example pushing a stormtrooper on his arse to gain a few seconds to help you escape won't make you a dark sider, but pushing that same trooper over a cliff would probably get you a good bit closer to the dark side)