Well there are lots...manu1959 said:give me an example of a slippery slope argument
The NRA fighting any and every bit of gun legislation out there.
NOW fighting any and every bit of abortion restriction out there.
ACLU fighting violations of privacy rights.
Religous groups fighting restrictions on religous displays paid for by tax-payer dollars.
The corralary of each of these at one time or another also used the slippery slope argument.
It's a political tool and to a degree a legitimate discussion. Hitler, Mussolini, Tojo, and Stalin all gave credence to the slippery slope argument and gave it significant policial power.