Kidnapping? No. But there is some risk of exposure to violent incidents if you're in the wrong place when occur. Stay away from mosques, popular markets and goverment buildings on Fridays, and for now avoid Sufi nights. However, none of these risks compare to what you would face going to the cities along the western edge of the country.
And that's why you've heard varied reports -- because the situation varies across the country.
I'm a white Australian male who has spent a lot of time in Pakistan over the past 2.5 years. I was most recently in Lahore about three weeks ago. It truly is one of the cultural highlights of Pakistan and I urge you to go. If you've not experienced Pakistani hospitality and good humour prior to this, you're in for a treat.
Are you only going to Lahore? You'll find it vastly different from Amritsar, that other notable Punjab city. If you're planning to enter from India and later return, you'd better check up on the two-month rule that applies to re-entry to India. If you can spend some time in Pakistan, you should also travel to the mountains of Gilgit-Baltistan, and experience the many different cultures that live in the valleys of that region. You'll also gain some relief from the oppressive heat of the long South Asian summer.
