A simple package which adds a strikethrough command, \strike.
\begin[papersize=50mm x 30mm]{document}
\script[src=packages/strike]
\noindent \strike{I am the}\strike[height=0.5zw]{ Eggman}
\noindent \strike[n=double]{They are the Eggmen}
\noindent \strike[n=triple]{I am the walrus}
\noindent Goo goo g'joob
\end{document}