I have to laugh at the disclaimer on your link:
"The text placed on this educational web site only represents the private opinion, fantastic imaginations and subjective feelings of an individual. The author disclaims any responsibility for the damage caused to anyone by the use of and/or manipulation with this text and he does not warrant the correctness, trueness, completeness, safety or usefulness of any information stated in it."
It is my own work, actually no real lawyer would be capable of such a precise work!
And now with a little bit of humor: Once when it was for the first time really important, I have made, also for the first time, an error in my disclaimer. I did not correctly stated that I am not responsible for what I have written.