Actually, deleting the host file deletes all associated data streams.
If a file of the same name is created on the system, the ADS' will not
remain:
\> echo this is a test > notepad.txt
\> echo testing again > notepad.txt:ads
\> more < notepad.txt
this is a test
\> more < notepad.txt:ads
testing again
\> del notepad.txt
\> more < notepad.txt:ads
The system cannot find the file specified.
\> touch notepad.txt
\> more < notepad.txt:ads
The system cannot find the file specified.
Just my two cents; carry on.