No, I am not persuaded by arguments against reservation that use 'merit' as their main plank. By definition, reservation provides an advantage to a favoured group only at the entry point. There's no further advantage as that groups makes its way through the academic system. Thus, I wouldn't worry at all about whether our bridges are designed by engineers who got in through reservation. If at all I worry about such things when I drive, it would be about bridges that are (a) designed by those receiving poor training in our lesser institutions, or (b) constructed by corrupt people that collude with other corrupt people in our public works departments.
I see reservation as our society's (admittedly clumsy) attempt to ensure that some of its disadvantaged members get at least some of the available opportunities. Much of the heat and fury over reservation arises essentially because these (education and employment) opportunities are scarce -- notwithstanding the 'India Shining' and 'Rising India' slogans. As opportunities expand, arguments against reservation would also lose their sting.
So, if you don't like reservation, direct your ire in a way that would create lots of new opportunities. Ask for more IITs, for example. Better yet, ask for real universities (not the hub-and-spoke variety that's all pervasive in our country), where you can get a well-rounded *and* high quality education.
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It is also instructive to see how IITs have coped with the the existing policy of reservation for SC/ST students:
The web site of one of the IITs points out that 'as the seats for the SC/ST students are often unfilled because adequate number of students do not qualify JEE with relaxed norms, a further relaxation of JEE norm is made to select students for a one year Preparatory Course.' [Source: Ram Kelkar's column]
While we are on the topic of the 'Preparatory Course', take a look at this article (from 2000).