Nope. There’s always two sides to a picture, and I’ve a highly sushpeeshiyosh mind when it comes to stuff such as smelling of ‘selling’
How do u detect: Well when u feel like they are going out of your ‘comfort zone’ … actually the key is that u take notice. Once u identify, use up all the possible creative ideas that our beautiful mind comes up with to rid one self of such ‘lasoorayz’ … sometimes if I do share with such kind, it won’t be because I felt obliged, but it was an ‘intentional share’ of info. Such types are also sometimes the idealist “BBC, CNN” i.e. Gossipy folks. Therefore sometimes u can use such kinds for ur own benefit, feed them the info that is true… and let it rippp 
(ofcourse it can backfire)
Like AQ said it depends. Some hoshyar ppl can take a slight hint. Some may not. u know like latoN kay bhooth bathoN say nahi mantay, so those type u apply ->:kursi: on, and the other wise ones u can kill 'em with sugar and shower them with words soft such as-> 
and they’ll understand. So again, the trick is to verify what level they need to be assigned in order to be dealt accordingly. Simple dimple!