Your solution depends on third parties checking the script or going based on some knowledge of "trusted sources." That has nothing to do with this hack, which exploits those who are "verifying" the script themselves before executing it.
The simple solution here is not to use curl/execute with a pipe. Just wget to save the file and check it locally (rather than through a browser) before executing.
The simple solution here is not to use curl/execute with a pipe. Just wget to save the file and check it locally (rather than through a browser) before executing.