[Jamie89]

You're right that there would be a lot more warnings for the BB6 housemates had this series taken place nowadays. I disagree however with implying that people shouldn't make complaints if they feel the need to or that it is pathetic to do so. I've never complained myself but everyone has a right to be offended and should feel free to express that without fear of retribution. I don't like this katie hopkins mentality of 'pc brigade' that basically just exists to shame people for being offended. It's all done under the cover of free speech but people who make complaints are also expressing their right to free speech. It can't be one rule for one and another for someone else.
To answer your main question though, I don't think it's that people are any more sensitive than before, but rather Big Brother is more sensitive. It's not the reality TV behemoth it used to be and it has to justify and defend it's existence more with every season. They give out warnings left right and centre not because they necessarily think that the warnings are needed, but simply to cover their arses and be seen to be taking responsible action. As for viewer complaints, the show has always attracted a lot (maybe not for the first few years but this can be explained by them not picking very controversial characters) so I don't think there is any real difference there.