On Wed, Nov 30, 2011 at 21:22, Gerard Meijssen <gerard.meijssen@gmail.com> wrote:
Please help me understand. The Grantha script is not the same as the Tamil script and it is not used to write Tamil right ? But even so; how can characters in a SCRIPT that are not used in a language damage that language ??

When people start writing something else and call it Tamil, mass consumption patterns of Tamil can differ and eventually the fear is Sanskritization of Tamil. (Aryanize is the political / cultural word). I cant get more definitive links than [1] which can help you understand, but there is a lot of context that is required. May be an English wiki article might help to understand the issue for a fresh eyes and go into the references. 
 
I do assume that you agree that the Grantha script should be included in Unicode.

I would personally agree with this blogpost[1] that Grantha can have its place, but independently, not along with Tamil. None of us(majority of Tamilians) want additional-grantha to be in Tamil's character set. Note that there exists already some grantha characters in Tamil which is in common use for last 300-400 years.[2] 

[1] http://tamil.berkeley.edu/grantha-letters-in-tamil
[2] http://en.wikipedia.org/wiki/Tamil_alphabet#Consonants_of_Modern_Tamil
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Regards
Srikanth.L